4.0.12 - December 2020

Another PS Move API release is here! This release fixes various small issues that came up in recent months. Changes since 4.0.11:

• Fix flipping of camera image on Linux (by @nitsch)
• Package SWIG-generated .cs files (by @nitsch)
• Fix macOS build in Travis CI
• Only link libusb if sixpair is to be used (Fixes #406)
• install_dependencies.sh: Use Python 3
• Various clean-ups, packaging improvements, etc...